For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningFront Bumper Energy Absorber Bracket Replacement
Preliminary Procedure
Remove the front bumper fascia opening cover. Refer to Front Bumper Fascia
Opening Lower Cover Replacement
Drivetrain and Front Suspension Frame Bolt Front
Caution: Refer to Fastener Caution in the Preface section.
Tighten
160 N·m (119 lb ft)
Note: Do NOT reu ...
Front Seat Track Synchronization
The fore/aft manual adjuster is composed of an inboard track assembly (5),
and outboard track (4) assembly, and an adjuster handle (1).
Each track assembly is made of an upper track (2) and a lower track (3). Both
tracks need to be aligned prior to installing in the vehicle.
To align t ...
Interior Windnoise
Warning: Refer to Assistant Driving Warning in the Preface section.
Interior windnoise is not heard when the window is lowered. Interior
windnoise is caused by the air leaving the inside of the vehicle
through a seal or a seam.
Tape over the relief valves to cause added air pressure wi ...